The Single-Degree-of-Freedom (SDOF) method is primarily used as a rapid screening tool in blast response assessment but is remarkably good at representing the structural dynamics of the problem. It gives satisfactory results for primary load carrying members such as beams, columns, walls, slabs and simple frames that constitute the main components of a building. SDOF methods can be implemented in graphical or numerical form, the latter being the most versatile. This seminar will cover the basic theory of SDOF and how it’s been implemented as a spreadsheet tool. Some examples and comparisons with experimental data will be presented.

The Terrorism Risk Assessment, Modelling and Mitigation Seminar Series (TRAMMSS) is a virtual seminar series focused on technical topics related to terrorism risk assessment, and modelling, including blast modelling and response; IEDs; vehicles as weapons; CBRN; big data for risk assessment, security and screening; and associated mitigation measures.


Dr Graham Schleyer CEng, FIMechE, SFHEA is a Senior Lecturer in the School of Engineering, having worked previously for several years in the gas industry and for shorter periods with leading consultancies in the UK and the US. Over the past 30 years or so he has conducted hundreds of field and laboratory tests on full-size and sub-scale structures involving gas, high explosive and pressurized air explosions which have provided fundamental insights into the explosion resistance of steel, RC and glazing as well as validation of numerical models and simplified analytical methods. Dr Schleyer is co-chair of the International Conference ‘Structures Under Shock and Impact’ (SUSI) organised by the Wessex Institute. He is a previous Royal Academy of Engineering Global Research Award holder (formerly Engineering Foresight Awards), and has published widely in journals, conference proceedings, and government and industry reports.

Who should attend

This seminar is open to guests from outside Cranfield, who may work in academia, research, or industry. Due to the potentially sensitive nature of this seminar series, guests should be able to show that they are affiliated with an appropriate bona fide organisation.


The event is free of charge, but participants must register in advance.

How to register

To attend this seminar, you must register for the TRAMMSS mailing list. This can be found via the main TRAMMSS website.